Microsoft is facing an early crisis of confidence in the quality of its Windows Vista operating system as computer security researchers and hackers have begun to find potentially serious flaws in the system that was released to corporate customers late last month. On Dec. 15, a Russian programmer posted a description of a flaw that makes it possible to increase a user's privileges on all of the company's recent operating systems, including Vista. Update by Thom: Ars thinks the situation is hot air, mostly, something I agree with (a cracker already has to have login credentials for the flaws to be of any use).